Python 我的while循环不是'；t为输入验证工作

试试这个：

end_program = False
while end_program == False:
    user_choice = input('\nWould you like to play a game?\n Please pick yes or no\n').lower()
    if user_choice != 'yes' or 'no':
        print('You didn\'t pick yes or no...try again please\n')
        end_program = False
    else:
        end_program = True

在检查多个条件时，您需要明确： 你不能说：

如果用户选择！='“是”或“否”

此处的“否”是导致错误的原因。您需要单独检查以下情况：

end_program = False
while end_program == False:
    user_choice = input('\nWould you like to play a game?\n Please pick yes or 
    no\n').lower()
    if user_choice != 'yes' or user_choice !='no':
       print('You didn\'t pick yes or no...try again please\n')
       end_program = False
    else:
       end_program = True

if user_choice != 'yes' or user_choice != 'no':